Results 61 to 70 of about 492,766 (213)

Gatekeepers of the Germ Line: How Mitochondria Shape Reproductive Evolution in Metazoans

Biology
Mitochondria play essential roles for animal reproduction, influencing not only cellular energetics but also gamete quality, inheritance and evolutionary patterns.
Yu-Tong Sun, Wan-Xi Yang
doaj   +1 more source

Progesterone significantly enhances the mobility of boar spermatozoa [PDF]

, 2013
Progesterone released from the cumulus cells of the oocyte causes a number of physiological responses in human sperm cells including hyperactivation, acrosome reaction and chemotaxis. We employed a validated sperm mobility assay, which involves measuring
Adya, Ashok K., Brown, Sean G., Campbell, Johan M., Madamidola, Oladipo, Savage, Anne L., Soriano, Renalyn, Tamhane, Kshitij   +6 more
core   +3 more sources

COVID-19 Severity and Androgen Receptor Polymorphism

Biology, 2022
During the COVID-19 pandemic, the most severe form of the disease was most often seen in male patients. The aim of this study was to identify any male predispositions that could be used to predict the outcome of the disease and enable early intervention.
Alessandra Buonacquisto, Anna Chiara Conflitti, Francesco Pallotti, Antonella Anzuini, Serena Bianchini, Luisa Caponecchia, Anna Carraro, Maria Rosa Ciardi, Fabiana Faja, Cristina Fiori, Daniele Gianfrilli, Andrea Lenzi, Miriam Lichtner, Claudio Maria Mastroianni, Patrizia Pasculli, Flavio Rizzo, Pietro Salacone, Annalisa Sebastianelli, Francesco Lombardo, Donatella Paoli   +19 more
doaj   +1 more source

REVIEW: Current Status of Extenders and Cryoprotectants on Fish Spermatozoa Cryopreservation [PDF]

, 2005
An important component of many studies of cryopreservation of fish spermatozoa is the type of extenders and cryoprotectants. The suitability of extenders and cryoprotectants differs from one fish to another.
Z.A, Muchlisin
core  

Sperm chromatin dispersion test before sperm preparation is predictive of clinical pregnancy in cases of unexplained infertility treated with intrauterine insemination and induction with clomiphene citrate [PDF]

, 2016
Background/aims: A large proportion of men with normal sperm results as analyzed using conventional techniques have fragmented DNA in their spermatozoa.
De Croo, Ilse, De Sutter, Petra, Gerris, Jan, Van den Abbeel, Etienne, Vandekerckhove, Frank   +4 more
core   +2 more sources

Does the FNA sperm retrieval failure prediction model work well for current NOA individuals undertaking risk screening before the operation? Model validation, high-risk population identification and potential alternative sperm retrieval exploration

BMC Medical Informatics and Decision Making
Background Non-obstructive azoospermia (NOA), the severe type of male infertility. The objective of this study was to evaluate the predictive accuracy of a prediction model of sperm retrieval failure with fine needle aspiration (FNA).
Xiaohui Jiang, Dingming Li, Yi Zheng, Yinxian Li, Hengzhou Bai, Guicheng Zhao, Yi Zhang, Yue Ma   +7 more
doaj   +1 more source

Nematode sperm

Parasitology Today, 1996
Parasitic nematode infections remain a major public health problem in many parts of the world. Because most of the current strategies aimed at controlling parasitic nematode infections have met with only limited success, it may be time to consider alternative approaches.
openaire   +2 more sources

Sperm Viability and Sperm Competition in Insects [PDF]

Current Biology, 2002
Sperm quality plays an important role in vertebrates in determining which male has the advantage when two or more males compete to fertilize a female's ova. In insects, however, the importance of sperm quality has never been considered, despite sperm competition being widespread and well studied in this group.
Hunter, F.M, Birkhead, T.R
openaire   +2 more sources

Obstetric and perinatal outcomes in pregnancies conceived with donor versus partner sperm: a systematic review and meta-analysis

Frontiers in Endocrinology
BackgroundMale-related factors contribute to 30-40% of infertility cases, with donor sperm serving as a critical solution for severe male infertility or paternally inherited genetic disorders.
Junjie Liu, Yanpeng Dai, Zuozhe Song, Xintao Sun, Dongdong Lv, Dehua Zhao   +5 more
doaj   +1 more source

The evolution of sperm morphometry in pheasants [PDF]

, 2007
Postcopulatory sexual selection is thought to be a potent evolutionary force driving the diversification of sperm shape and function across species. In birds, insemination and fertilisation are separated in time and sperm storage increases the duration
Birkhead, T.R., Immler, S., Lesobre, L., Roman, Y., Saint-Jalme, M., Sorci, G.   +5 more
core   +3 more sources